/* K8 NUMA support */ /* Copyright 2002,2003 by Andi Kleen, SuSE Labs */ /* 2.5 Version loosely based on the NUMAQ Code by Pat Gaughen. */ #ifndef _ASM_X86_64_MMZONE_H #define _ASM_X86_64_MMZONE_H 1 #ifdef CONFIG_NUMA #define VIRTUAL_BUG_ON(x) #include <asm/smp.h> /* Should really switch to dynamic allocation at some point */ #define NODEMAPSIZE 0x4fff /* Simple perfect hash to map physical addresses to node numbers */ struct memnode { int shift; u8 map[NODEMAPSIZE]; } ____cacheline_aligned; extern struct memnode memnode; #define memnode_shift memnode.shift #define memnodemap memnode.map extern struct pglist_data *node_data[]; static inline __attribute__((pure)) int phys_to_nid(unsigned long addr) { unsigned nid; VIRTUAL_BUG_ON((addr >> memnode_shift) >= NODEMAPSIZE); nid = memnodemap[addr >> memnode_shift]; VIRTUAL_BUG_ON(nid >= MAX_NUMNODES || !node_data[nid]); return nid; } #define NODE_DATA(nid) (node_data[nid]) #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) #define node_end_pfn(nid) (NODE_DATA(nid)->node_start_pfn + \ NODE_DATA(nid)->node_spanned_pages) #ifdef CONFIG_DISCONTIGMEM #define pfn_to_nid(pfn) phys_to_nid((unsigned long)(pfn) << PAGE_SHIFT) #define kvaddr_to_nid(kaddr) phys_to_nid(__pa(kaddr)) extern int pfn_valid(unsigned long pfn); #endif #endif #endif